perf(router): load service with route.ws_id while building routers

[chobits]

Summary

1. From the perspective of more precise searching for services from select API, the route here already has a ws_id, so we should directly search for the service under the specific workspace
2. LMDB has removed all the global query keys (see perf(lmdb): remove the key with global workspace id * #14028), if we select services without ws_id, it will search it through all the workspace, which has a performance issue.

Checklist

• The Pull Request has tests - reuse original tests that could test router building
• Skip changelog because we could reuse changelog/unreleased/kong/perf-lmdb-remove-global-query-key.yml
• There is a user-facing docs PR against https://github.com/Kong/docs.konghq.com - PUT DOCS PR HERE

Issue reference

Fix KAG-6087, KAG-5704